Electric current conversion discharge apparatus



Aug. 17, 1937. 1 A M 2,090,054

ELECTRIC CURRENT CONVERSION DISCHARGE APPARATUS Filed May 51. 1933 so 3/ a2 JzVe/z'zor U/zo Lam/m JZor/ze y Patented Aug. 17, 1937 I UNITED STATES PATENT OFFICE ELECTRIC CURRENT CONVERSION DIS- CHARGE APPARATUS Uno Lamrn, Ludvika, Sweden, assignor to Allmanna Svenska Elektriska Aktiebolaget, Vasteras, Sweden, a corporation of Sweden Application May 31, 1933, Serial No. 673,669

In Sweden April 25, 1932 1 Claim. (Cl. 175-363) The present invention relates to electric curfor instance to the positive terminal of the source rent converting vapor discharge apparatus for of direct current 6. The negative terminal of the converting into alternating current from direct same source is connected to the cathode 3. The

5 current or from alternating current of other primary windings 23, 24, 25 cooperating with the frequency, and more particularly to such apsecondary windings 26, 21, 28 respectively, are 5 paratus in which a source of intermittent current fed by an intermittent current, and the voltage of is connected between certain points of a transeach anode intended to ignite is thereby temfOrme eed Said Vap discharge pp porarily raised above that to be extinguished the said intermittent current acting to transfer whereby the current is transferred to the former the current from one anode to another of the disanode, in a manner known in principle. The 10 charge apparatus. transformer is has also secondary windings 30, 3|, One form of the invention is diagrammatically 32 feeding the alternating current load circuit. illustrated in the drawing. I claim as my invention: Referring to the drawing, which shows a three- In electric current converting vapor discharge phase converter, I! designates the metal vapor apparatus for converting into alternating current 15 apparatus proper, while 3 is the cathode, l3-l8 from direct current or from alternating current the anodes and I3 to 58 the controlling grids, of other frequency, a cathode, a plurality of on which a voltage regulable in phase is impressed anodes alternatingly cooperating therewith, conover an induction regulator 33 and a transformer trol grids for said anodes, transformer windings 34. The main transformer, generally designated each connected at each end to a respective by 19, has three phase windings, each end of anode, other transformer windings cooperating which is connected to one of the six anodes. Each therewith and connected to the load circuit, half of a winding thus connected bears the numa source of intermittent current connected ber of the corresponding anode with the index between the midpoints of said first mentioned thus the winding halves are designated l3"l8. transformer windings, and a supply circuit con- The midpoints of the three phase windings are nected between said cathode and the midpoint connected together over the secondary windings of said source of intermittent current.

26, 21, 28 of a transformer to one point, which is connected to one terminal of the supply circuit, UNO LAMM. 

